/Engine/Source/Runtime/MeshUtilitiesCommon/Public/Allocator2D.h
void InitRuns ( [TArray](API\Runtime\Core\Containers\TArray)< [FRun](API\Runtime\MeshUtilitiesCommon\FAllocator2D\FRun) > & Runs, uint32 PrimaryResolution, uint32 PerpendicularRasterSize )